RF device and communication apparatus using the same
First Claim
1. An RF device comprising:
- a first substrate made of a material with a lower relative dielectric constant;
a first RF circuit for a lower frequency band, which is provided in said first substrate;
a second substrate made of a material with a higher relative dielectric constant larger than said lower relative dielectric constant, anda second RF circuit for a higher frequency band, at least a part of which is provided in a vicinity of said second substrate,wherein said first RF circuit and said second RF circuit are connected to each other,said part of said second RF circuit is sandwiched between said first substrate and said second substrate,said second substrate is partially overlaid on said first substrate, a semiconductor device or passive device is provided on a region in the surface of said first substrate on which said second substrate is not overlaid, and a multilayered wiring pattern made of copper or silver is formed in said first substrate, whereby said first RF circuit is formed.
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Accused Products
Abstract
An RF device includes a first substrate having a lower relative dielectric constant, a first RF circuit for a lower frequency band provided in the first substrate, a second substrate having a higher relative dielectric constant larger than the lower relative dielectric constant, and a second RF circuit for a higher frequency band having a part of the second RF circuit sandwiched between the first substrate and the second substrate. The first RF circuit and the second RF circuit are connected to each other and the second substrate is partially overlaid on the first substrate. A semiconductor device or passive device is provided on a region in the surface of the first substrate on which the second substrate is not overlaid, and a multilayered wiring pattern made of copper or silver is formed in the first substrate to form the first RF circuit.
64 Citations
11 Claims
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1. An RF device comprising:
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a first substrate made of a material with a lower relative dielectric constant; a first RF circuit for a lower frequency band, which is provided in said first substrate; a second substrate made of a material with a higher relative dielectric constant larger than said lower relative dielectric constant, and a second RF circuit for a higher frequency band, at least a part of which is provided in a vicinity of said second substrate, wherein said first RF circuit and said second RF circuit are connected to each other, said part of said second RF circuit is sandwiched between said first substrate and said second substrate, said second substrate is partially overlaid on said first substrate, a semiconductor device or passive device is provided on a region in the surface of said first substrate on which said second substrate is not overlaid, and a multilayered wiring pattern made of copper or silver is formed in said first substrate, whereby said first RF circuit is formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification